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  • Brogårdh, ChristinaLund University,Lunds universitet,Människan i rörelse: hälsa och rehabilitering,Forskargrupper vid Lunds universitet,Human Movement: health and rehabilitation,Lund University Research Groups,Skåne University Hospital (author)

Psychometric properties of the Walking Impact Scale (Walk-12) in persons with late effects of polio

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2020-06-17
  • Wiley,2021
  • 10
  • electronicrdacarrier

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  • LIBRIS-ID:oai:researchportal.hkr.se/admin:publications/72f289f9-1ebb-4c9c-9536-6eb4df8923dd
  • oai:researchportal.hkr.se/admin:publications/72f289f9-1ebb-4c9c-9536-6eb4df8923ddURI
  • https://doi.org/10.1002/pmrj.12403DOI
  • https://lup.lub.lu.se/record/3c0626b5-86e3-4cb5-80dd-7a49d1110bb5URI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

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  • Funding Information: The authors are grateful to the individuals who volunteered to participate. The study was supported by grants from the Skåne county council's research and development foundation and the Faculty of Medicine at Lund University. Publisher Copyright: © 2020 The Authors. PM&R published by Wiley Periodicals LLC on behalf of American Academy of Physical Medicine and Rehabilitation
  • Background: Many persons with late effects of polio (LEoP) perceive walking limitations in everyday life. A common rating scale to assess walking limitations is the Walking Impact Scale (Walk-12). However, there is limited knowledge about its psychometric properties. Objective: To investigate the psychometric properties of Walk-12 in persons with LEoP. Design: Rasch model analysis of cross-sectional data. Setting: University hospital. Participants: A total of 325 persons with LEoP (175 women; mean age 70 ± 10 years). Main Outcome Measurement: The Walk-12, comprising 12 items with five response categories ranging from 1 (not at all) to 5 (extremely). Methods: Data of Walk-12 were collected by a postal survey. The Rasch model analysis was used to analyze unidimensionality of the scale, local dependency, targeting, hierarchical order of items, Differential Item Functioning (DIF), response category functioning, and reliability (Person Separation Index, PSI). Raw score transformation to interval measurements was also performed. Results: The analysis revealed that Walk-12 was multidimensional and suffered from some local dependency. Targeting was compromised among persons with less and more walking limitations. Hierarchically, the most difficult item to perform was “running” and the easiest was “walking indoors with support”. There was a minor DIF for gender in one item (“support when walking outdoors”). Reliability was high (PSI = 0.94). Disordered response category thresholds were found for three items; when merging the middle response categories for these items model fit slightly improved and unidimensionality was achieved. Conclusions: The Walk-12, in its current version, does not fully meet the rigorous psychometric Rasch measurement standards in persons with LEoP. Further development of the scale is warranted, including merging response categories and complementing Walk-12 with objective measures of gait in order to improve targeting. As these limitations can be considered minor, the current version of Walk-12 can still be useful for research and clinical practice.

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  • Lexell, JanLund University,Lunds universitet,Rehabiliteringsmedicin,Forskargrupper vid Lunds universitet,Rehabilitation medicine,Lund University Research Groups,Skåne University Hospital(Swepub:lu)neur-jle (author)
  • Westergren, AlbertKristianstad University,Lund University,Lunds universitet,Hälsofrämjande komplexa interventioner,Forskargrupper vid Lunds universitet,Health-promoting Complex Interventions,Lund University Research Groups,Department of Nursing and Integrated Health Sciences,Patient Reported Outcomes - Clinical Assessment Research and Education (PROCARE),Avdelningen för sjuksköterskeutbildningarna och integrerad hälsovetenskap(Swepub:lu)al1611we (author)
  • Människan i rörelse: hälsa och rehabiliteringForskargrupper vid Lunds universitet (creator_code:org_t)

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  • In:PM&R: Wiley13:3, s. 297-3061934-14821934-1563

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